Boat-propeller.



PATENTED JAN. 1, 1907.

s. EDGAR. BOAT PROPELLBR, APPLICATION FILED JAN- 16, 1906.

2 SHEETB-SHEET 1.

INVENTOI? KZE /ar ATTORNEYS,

WITNESSES.

r: No an; PETERS Co WA5HJNOTDN, n. c.

PATENTED JAN. 1,1907.

S. N. EDGAR.

I BOAT PROPBLLER.

uruoumn FILED JAN-18. 1906.

2 sums-sum 2.

INVENTOR WITNESSES: M f4 \/%ad/ Samuz? W E'J 73 ATTORNEKS UNITED STATESPATENT OFFICE.

BOA T -PROPELLER.

Specification of Letters Patent.

Patented J an. 1. 1907.

Application filed January 16,1906. Serial No. 296.340-

To all whom it may concern.-

Be it known that I, SAMUEL NOOLEY ED- GAR, a citizen of the UnitedStates, residing at Greenville, in the county of Hunt and State ofTexas, have invented a new and use ful Improvement in a Boat-Propeller,of which the following is a specification.

My invention relates to certain new and useful improvements inboat-propellers, and more particularly to reciprocating propellers.

The object of my invention is to provide a propeller which is capable ofpropelling a boat at a very high rate of speed and at a very low cost.

Another object of my invention is to improve on the general propellers,so that the difficulties now existing will be overcome and a veryefficient propeller will be obtained.

Another object of my invention is to pro vide a very simple drivingmechanism in connection with the propellers which is very effective inuse. 1

With these and various other objects in view the invention consists ofthe novel features of construction, combination, and arrangement ofparts hereinafter fully described, and pointed out in the claims.

In the drawings, forming a part of this specification, Figure 1 is aside view of the stern of the vessel, showing the propeller in place.Fig. 2 is a top plan view of the driving mechanism and propeller, one ofthe propellers being broken away. Fig. 3 is a perspective view of one ofthe propellers. Fig. 4 is a side view of the propeller. Fig. 5 is an endview of one of the propellers.

Referring to the drawings, A indicates a pair of cylinders, providedwith the usual valves and feed-pipe, adapted to be arranged in the sternof the vessel B. Piston-rods A extend out the rear ends of thecylinders, having bifurcated enlarged ends A connected by pins O, whichare adapted to pass through the slots E, formed in the ends of the barE, pivoted centrally on a stud-post F, arranged in the rear of thecylinder.

A shaft G, slidably mounted in a bracket H supporting the rudder,extends through the stuffing-box into the vessel and is provided with abifurcated lug Gr adjacent its end in which the end of the link I ispivoted. The other end of the link I is connected to the end of one ofthe piston-rods. A sleeve J is mounted on the shaft G, provided with acut-away portion adjacent its ends and a bifurcated lug J, in which alink K is pivoted,

having its other end connected to the end of the other piston-rod.

A propeller L is mounted on the end of the shaft adjacent its other endand consists of two wings L L hinged together, having cutout ortions LL, through which the shaft is a apted to pass. The wings are hinged tothe shaft, so that they can open and close. Pins L L project out fromeach wing for the purpose of preventing the wings from closing tightlytogether. Triangular sections M M are connected to the upper and loweredges of the wings by hinges iv and the meeting edges of the triangularsections are hinged together at M. Openings are formed in the outercorners of the wings carrying chains N, which are connected to the endof the shaft G, releasing the hinges of the greatest amount the drivingmechanism that the propellers will work in opposite directions to eachother, so that one of the propellers will be forcing the vessel forwardas the other is returning after it has reached the end of the stroke.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a boat-propeller, the combination With a pair of cylindersprovided with pistonrods, of a shaft provided with a propeller at itsend connected to one of said piston-rods, a sleeve arranged on saidshaft provided with a propeller at its end connected to the otherpiston-rod, and a bar connecting said pistonrods for the purposedescribed.

2. In a boat-propeller, the combination with a pair of cylindersprovided with pistonrods, of a shaft provided with a folding propelleradjacent one end, slidably mounted in a bracket, a link connecting theother end of said shaft to one of the piston-rods, a sleeve arranged onsaid shaft provided with a folding propeller, adjacent one end, a linkconnecting the other end of said sleeve to the other piston-rod, and abar pivoted on a studpost connecting said piston-rods, for the purposedescribed.

3. In a boat-propeller, the combination with a pair of cylindersprovided with pistonrods, of ashaft slidably mounted in a bracket IOCrods, a sleeve mounted on said shaft connectedto the other rod, wingshinged to the shaft and sleeve, triangular sections hinged together andto the upper and lower edges of the wings, pins extending inwardly fromsaid wings and chains connecting said wings to the shaft and sleeve, forthe purpose de- SAMUEL NOOLEY EDGAR. Witnesses:

L. L. BOWMAN, R. E. HAWKINS.

I scribed.

